Effect of Bi deficiency on grain alignment of BiPb-2223 thin film fabricated using rf sputtering process and on critical current density properties

Aksan, M.A.; Altın, S.; Yakıncı, M. E.; Güldeste, A.; Balci, Y.

doi:10.1179/026708309x12506933873549

Cited by 9 publications

(4 citation statements)

References 41 publications

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“…zero at T cM for both series, the area of diamagnetic is higher than zero, indicating the presence of a superconducting state with an expected critical current, as previously reported. 59,60 As shown in Fig. 14a and b, the onset of diamagnetism T cM decreases with increasing La for both series, followed by a sharp increase to 80 K for La = 0.30 samples.…”

Section: Resistivity Analysismentioning

confidence: 74%

Comparative Study of the Effects of La-Substituted Ca in (Bi, Pb):2212 and (Bi, Pb):2223 Superconductors

Sedky

Salah

2022

J. Electron. Mater.

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We report here a comparative study of the effects of La-substituted Ca on (Bi, Pb):2212 and (Bi, Pb):2223 superconductors with various La content (0.00 ≤ x ≤ 0.30). Regardless of the effects of La, it is evident that the superconducting volume fraction, excess of oxygen, critical concentration for quenching superconductivity, Vickers hardness, anisotropy, interlayer coupling, critical magnetic fields, and critical current were higher for the 2212 series than the 2223 series. In contrast, orthorhombic distortion, c-parameter, crystallite diameter, doping distance, distance between two Cu atoms, hole carrier/Cu ion ratio, melting temperature Tm, critical temperature Tc, onset of diamagnetic TcM, surface energy, elastic component, resistance pressure, and c-axis coherence length were higher for the 2223 series than the 2212 series. An inverse linear relationship between Tm and Tc was estimated for both series, and for room-temperature (RT) bismuth–strontium–calcium–copper–oxide (BSCCO) superconductors, the required Tm values should be 1048.03°C for the 2223 series and 784.48°C for the 2212 series. Surprisingly, the difference in temperature between zero resistivity and diamagnetic onset |TcM − TcR| for La = 0.30 samples is 30 K. In the critical field region (CFR), the exponents of order parameters (OPD) are two-dimensional (2D), but their values were higher for the 2212 series than the 2223 series. Further, they became three-dimensional (3D) as La increased to 0.30 due to the reduced effective length in highly substituted samples. Our results were discussed with the help of the differences in the physical parameters between the considered series. These findings revealed that the 2212 series is more suitable for applications that need higher hardness and critical fields and currents. In contrast, the 2223 series is more suitable for research for higher Tc and altering plastic deformation. To our knowledge, the present systematic investigation has not been reported elsewhere, which highlights the present work.

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Section: Resistivity Analysismentioning

confidence: 74%

Comparative Study of the Effects of La-Substituted Ca in (Bi, Pb):2212 and (Bi, Pb):2223 Superconductors

Sedky

Salah

2022

J. Electron. Mater.

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“…After the discovery of superconductivity in Bi-Sr-Ca-Cu-O (BSCCO) high-temperature superconductors [1,2], Bibased thin films are the most promising materials for potential technological (especially microelectronics devices) and industrial applications [3][4][5][6][7][8][9] their remarkable smaller power losses, high current and magnetic field carrying capacity, optical and electronic properties [10][11][12][13][14][15][16][17][18]. Nevertheless, their applications in magnetic fields and high temperatures are restricted because of the structural layer, very low charge carrier density, strong anisotropic properties, extremely short coherence length (ξ ), and large penetration depth (λ).…”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing Time and Temperature on Microstructural and Superconducting Properties of (Bi,Pb)-2212 Thin Films Produced by Magnetron Reactive Sputtering

Bal

Varılcı

2012

J Supercond Nov Magn

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This study deals with the role of various annealing time (1 h, 2 h, 4 h, 6 h and 8 h) and temperature (840 and 850°C) on the microstructural and superconducting properties of thin films with the aid of scanning electron microscopy (SEM), X-Ray analysis (XRD), electron dispersive X-Ray (EDX), resistivity and transport critical current density (J c ) measurements. The T c , J c , variation of transition temperatures, hole-carrier concentration, grain size, phase purity, lattice parameter, surface morphology, element distribution, crystallinity and resistivity (at room temperature) values of the films prepared are compared with each other. Critical transition temperatures (T c ) of the samples are deduced from the dc resistivity measurement while critical current density values are estimated from the critical current and total cross-sectional area values. It is found that maximum T c of 79.7 K and J c of 1520 A/cm 2 are observed for the film annealed at 840°C for 6 h as against 54.9 K and 30 A/cm 2 (minimum values), respectively, for the film annealed at 840°C for 4 h. Moreover, SEM images indicate that the former has the best crystallinity, grain connectivity and largest grain size. Based on these results, T c and J c values of the samples studied are found to depend strongly on the microstructure. Additionally, EDX results show that the elements used for the preparation of all the samples are observed to distribute homogeneously. As for the XRD results, all the samples exhibit the polycrystalline superconducting phase with the changing intensity This study is devoted to Gulnur Ozdemir on the occasion of her 26th Birthday. of diffraction lines. According to the refinement of cell parameters done by considering the structural modulation, the largest lattice parameter a and c are obtained for the film annealed at 840°C for 8 h. To sum up, the aim of the present study is not only to investigate the changes of microstructural and superconducting properties of the samples fabricated in the varied time and temperature but to determine the best ambient for the film fabrication and show the feasibility of obtaining Bi-2212 film with tailored structure, as well.

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“…Most of them were based on the grain orientation with the transport direction and the improvement of the grain links. Many processes have shown to be useful to produce high electrical density (but usually low current intensity) carrying materials, such as thin films [7], cables or tapes [8]. On the other hand, other processes are useful to produce bulk materials with high electrical current transport properties, such as hot-forging [9], microwave texturing [10], laser floating zone (LFZ) [11], or the new electrically assisted laser floating zone (EALFZ) technique [12].…”

Section: Introductionmentioning

confidence: 99%

Modification of physical and structural properties of Bi1.8Pb0.4Sr2Ca2.2Cu3Oy ceramics induced by annealing

Özkurt

Madre

Sotelo

et al. 2013

Physica B: Condensed Matter

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Effect of Bi deficiency on grain alignment of BiPb-2223 thin film fabricated using rf sputtering process and on critical current density properties

Cited by 9 publications

References 41 publications

Comparative Study of the Effects of La-Substituted Ca in (Bi, Pb):2212 and (Bi, Pb):2223 Superconductors

Comparative Study of the Effects of La-Substituted Ca in (Bi, Pb):2212 and (Bi, Pb):2223 Superconductors

Effect of Annealing Time and Temperature on Microstructural and Superconducting Properties of (Bi,Pb)-2212 Thin Films Produced by Magnetron Reactive Sputtering

Modification of physical and structural properties of Bi1.8Pb0.4Sr2Ca2.2Cu3Oy ceramics induced by annealing

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